Static fracturing pipe short pipe replacement device

Abstract

The utility model discloses a static fracturing pipe short pipe replacement device which can be used for renovating a collapsed and blocked pipeline, improving the renovating quality and efficiency of an urban underground pipe network, reducing the renovating difficulty and reducing the construction cost. In the pipeline renovation process, the road surface cannot be damaged, overground traffic cannot be disturbed, and the influence on existing structures and underground pipelines around construction is small; the device comprises a first oil jacking workbench arranged in a receiving well and a second oil jacking workbench arranged in an inserting well, and further comprises a jacking rod, an extruding and expanding device, a direction adjusting centralizer and a new pipe joint.

Description

Technical Field

[0001] The utility model relates to the technical field of municipal pipeline engineering, in particular to a static pressure fracturing pipe short pipe replacement device. Background Art

[0002] With the rapid development of cities, the scale of urban underground pipe networks is also getting larger and larger. The normal operation of urban underground pipe networks is an important condition for ensuring the normal operation of urban infrastructure. However, the construction standards of some urban road drainage pipe networks are low. As time goes by, the weak infrastructure problems such as small pipe diameter, pipe deformation, and damage have become prominent. Moreover, most of the underground pipes are combined rainwater and sewage pipes, and the sewage pipes are almost blocked by sludge. In heavy rainfall weather, the pipes cannot be drained in time, and multiple water accumulation points are prone to appear on the roads, affecting the normal operation of the infrastructure on the ground. The improvement of rainwater and sewage pipe networks has become an urgent matter for every city.

[0003] The rainwater and sewage pipe network renovation usually adopts the direct excavation method. The direct excavation method will damage the road surface on a large scale, the construction period is long, and it will have a great impact on vehicle traffic and pedestrian travel. In addition, the underground pipelines are complicated, and direct excavation is easy to affect the surrounding structures and underground pipelines, which will increase the difficulty of excavation and construction costs, and the economic benefits are low. With the development of rainwater and sewage pipe network renovation technology, non-excavation methods are gradually adopted for pipeline renovation. For example, the Chinese invention patent with application publication number CN116357832 A discloses a municipal pipeline static fracturing pipe repair device and method. The pipeline repair by the device and method can avoid blocking traffic and affecting residents' production and life. However, the device and method are only applicable to the situation where the pipeline is unobstructed, and are not applicable to the situation where the pipeline collapses or is blocked. In the case of pipeline blockage, it will affect the quality of pipeline repair.

[0004] During the renovation of the rainwater and sewage pipe network, the following problems usually exist: First, during the use of the pipe, sedimentation and scaling will occur inside the pipe, burrs and protrusions will appear on the inner wall of the pipe, and after the pipe itself is deformed or damaged, the soil will settle, collapse, and block the pipe. During the non-excavation renovation and repair of the pipe, it is necessary to keep the inside of the pipe unobstructed so that the traction rod or wire rope can pass through the pipe. After the inside of the pipe is blocked, the traction rod or wire rope cannot pass through the pipe according to the existing route, resulting in difficulties in the renovation of the pipe; second, during the process of using the traction rod for pipeline renovation, the cylinder is required to provide power. The strength and stability of the cylinder in the well chamber are crucial to the smooth progress of the pipeline renovation. If the reaction force during the operation of the cylinder cannot be effectively dispersed, it will affect the reliability of the cylinder and the smooth progress of the pipeline renovation; third, the cylinder in the well chamber is always connected to the traction rod, and the placement of the new pipe will interfere with the traction rod, affecting the efficiency of the placement of the new pipe. Utility Model Content

[0005] At least one of the purposes of the present utility model is to provide a static fracturing pipe short pipe replacement device to overcome the problems existing in the above-mentioned prior art, which can repair collapsed and blocked pipes, improve the repair quality and efficiency of urban underground pipe networks, reduce the difficulty of pipe repair, and reduce construction costs.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model includes the following aspects.

[0007] A static fracturing pipe short pipe replacement device comprises a first oil jacking workbench arranged in a receiving well and a second oil jacking workbench arranged in an insertion well, and also comprises a push rod, a squeezer, a direction adjusting and centralizing device and a new pipe section; the first oil jacking workbench is used to apply pressure or tension to the push rod to push the push rod into or pull out of the original pipeline, and the push rod comprises a plurality of push rod units connected in sequence; the squeezer is used to break the original pipeline and squeeze the original pipeline into the soil around the original pipeline; the direction adjusting and centralizing device is coaxially arranged on the push rod and is used to correct the deviation and orientation so that the push rod is pushed along the wall of the original pipeline; the second oil jacking workbench is used to push the new pipe section into the original pipeline so that the new pipe section replaces the original pipeline, and the second oil jacking workbench is also used to apply pressure to the squeezer and the new pipe section so that the squeezer and the new pipe section move forward in the original pipeline and break the original pipeline.

[0008] Preferably, the first oil top workbench includes a first oil top and a first load-bearing structure, and the first oil top is connected to the oil circuit control system; the second oil top workbench includes a second oil top and a second load-bearing structure, and the second oil top is connected to the oil circuit control system.

[0009] Preferably, the first load-bearing structure includes a load-bearing steel plate and an I-beam, the load-bearing steel plate is arranged on the wall of the receiving well, the bottom of the load-bearing steel plate is embedded in the ground, a mounting hole is arranged on the load-bearing steel plate, two I-beams are relatively arranged on both sides of the mounting hole of the load-bearing steel plate, and the bottom of the I-beam is embedded in the ground; the first oil top is arranged between the two I-beams and passes through the mounting hole; the second load-bearing structure includes a load-bearing steel plate and an I-beam.

[0010] Preferably, the push rod unit is a cylindrical rod, the first end of the push rod unit is provided with an internal thread, the second end is provided with an external thread, and one or more pin holes are provided in the length direction of the push rod unit.

[0011] Preferably, the direction-adjusting stabilizer comprises a cone tip, and the cone bottom of the cone tip is detachably connected, welded or integrally formed with the first-section top rod unit.

[0012] Preferably, the steering stabilizer includes a steering ball and a cone tip, the cone tip is coaxially arranged with the steering ball, the steering ball is arranged between the top rod unit and the cone tip, or the steering ball is arranged between two opposite cone tips, or two steering balls are arranged between two opposite cone tips.

[0013] Preferably, connecting rods are radially symmetrically arranged on the steering ball, a connecting hole is coaxially arranged at the first end of the push rod unit or the cone bottom of the cone tip, and a connecting rod is coaxially arranged at the cone bottom and / or cone top of the cone tip.

[0014] Preferably, the diameter of the steering ball is larger than the diameter of the cone bottom of the cone tip, the diameter of the steering ball is not smaller than the diameter of the push rod unit, and the diameter of the push rod unit is slightly smaller than the diameter of the original pipe.

[0015] Preferably, the squeezer is a solid or hollow cylindrical structure, a plurality of guide drill blades are circumferentially arranged on the outer wall of the squeezer, and a positioning ring is coaxially arranged on the squeezer.

[0016] Preferably, the new pipe sections are made of high-density and high-pressure polyethylene pipes, and adjacent new pipe sections are connected by means of socket-and-spigot locking buckles, and sealing rings are provided at the connection positions of the new pipe sections.

[0017] In summary, due to the adoption of the above technical solution, the utility model has at least the following beneficial effects:

[0018] By setting up a directional centralizer, the resistance during the jacking of the jack or the replacement of the new pipe section can be reduced, the jacking of the jack or the replacement of the new pipe section can be prevented from deflecting during the jacking of the jack or the replacement of the new pipe section, and the smooth progress of the new pipe section replacement process can be ensured; under the action of the directional centralizer, the jack can be jacked along the existing route in the collapsed and blocked pipeline.

[0019] During the replacement of the new pipe segment, the push rod is connected to the first oil top, and the pulling out process of the push rod will not interfere with the installation process of the new pipe segment, which greatly improves the replacement efficiency of the new pipe segment; the new pipe segment can also be installed after the push rod is completely pulled out of the original pipeline, and the installation of the new pipe segment can be separated from the push rod; during the installation of the new pipe segment, installing an adjusting straightener before installing the expander can further clear away obstacles in the original pipeline and ensure the smooth installation of the new pipe segment.

[0020] The first oil top workbench includes a first oil top and a first load-bearing structure, and the second oil top workbench includes a second oil top and a second load-bearing structure. The first load-bearing structure and the second load-bearing structure can respectively disperse the reaction force of the first oil top and the second oil top during the working process to the well wall, so that the first oil top and the second oil top maintain stability, thereby ensuring the smooth progress of the new pipe segment replacement process.

[0021] During the replacement of the new pipe section, there is no need to dig a new working well, which avoids damage to the road surface, does not interfere with road traffic, and has little impact on buildings and underground pipelines near the construction. The device of the utility model can replace 30-50m long pipes every day, greatly improving the efficiency and quality of pipeline renovation, and has great economic benefits in the process of large-scale underground pipeline renovation; during the pipeline renovation process, the device of the utility model is suitable for pipelines with a burial depth of not less than 1.5m. For underground pipelines with shallow backfill soil and original pipelines of corrugated pipes and concrete pipes, the device of the utility model has high construction quality and construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of a short-tube replacement device for static fracturing pipe according to an exemplary embodiment of the utility model.

[0023] Figure 2 It is a schematic diagram of the connection structure between the push rod unit and the direction-adjusting stabilizer of an exemplary embodiment of the utility model.

[0024] Figure 3 The figure is a schematic structural diagram of a steering centralizer according to another exemplary embodiment of the present invention.

[0025] Figure 4 The figure is a schematic diagram of the connection structure between the steering centralizer and the push rod unit of another exemplary embodiment of the utility model.

[0026] Figure 5 The figure is a schematic diagram of the connection between the directional centralizer and the squeeze expander of the exemplary embodiment of the utility model.

[0027] Figure 6 It is an enlarged schematic diagram of the connection parts of adjacent new pipe sections of an exemplary embodiment of the utility model.

[0028] Figure 7 It is a side view of the expander structure of an exemplary embodiment of the utility model.

[0029] Markings in the figure: 1-first oil jack working table, 11-first oil jack, 12-first load-bearing structure, 2-second oil jack working table, 21-second oil jack, 22-second load-bearing structure, 23-top plate, 3-top rod, 31-top rod unit, 4-expander, 41-guide drill blade, 42-positioning ring, 5-direction adjustment stabilizer, 51-direction adjustment ball, 52-cone tip, 53-connecting rod, 6-new pipe section, 7-original pipeline, 8-receiving well, 9-insertion well, a-sealing ring. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments to make the purpose, technical solutions and advantages of the present invention more clearly understood. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0031] refer to Figure 1 The static fracturing pipe short pipe replacement device of the exemplary embodiment of the utility model comprises a first oil top workbench 1 arranged in a receiving well 8 and a second oil top workbench 2 arranged in an insertion well 9, and also comprises a push rod 3, a squeeze expander 4, a direction adjustment stabilizer 5 and a new pipe section 6; the first oil top workbench 1 is used to apply pressure to the push rod 3 to push the push rod 3 into the original pipeline 7, or to apply tension to the push rod 3 to pull the push rod 3 out of the original pipeline 7; the push rod 3 comprises a plurality of push rod units 31 connected in sequence, and the push rod 3 is used to clean the original pipeline 7. pipeline, so that the original pipeline remains unobstructed; the squeezer 4 is used to break the original pipeline 7 and squeeze the original pipeline 7 into the soil around the original pipeline 7; the direction-adjusting stabilizer 5 is arranged on the push rod 3, which is used to correct the deviation and direction, so that the push rod 3 is pushed forward along the wall of the original pipeline; the second oil-jacking workbench 2 is used to push the new pipe segment 6 into the original pipeline 7, so that the new pipe segment 6 replaces the original pipeline 7, and the second oil-jacking workbench 2 is also used to apply pressure to the squeezer 4 and the new pipe segment 6, so that the squeezer 4 and the new pipe segment 6 move forward in the original pipeline 7 and break the original pipeline 7.

[0032] The first oil jack workbench 1 includes a first oil jack 11 and a first bearing structure 12. The first oil jack 11 is connected to an oil circuit control system. The oil circuit control system is used to control the working state of the first oil jack 11, so that the first oil jack 11 pushes in or pulls out the push rod 3. The first bearing structure 12 includes a bearing steel plate and an I-beam. The bearing steel plate is arranged on the wall of the receiving well 8, and its bottom is embedded in the ground. The bearing steel plate is provided with a mounting hole. Two I-beams are relatively arranged on both sides of the mounting hole of the bearing steel plate, and the bottom of the I-beam is embedded in the ground. The first oil jack 11 is arranged between the two I-beams and passes through the mounting hole. When the first oil jack 11 pushes in or pulls out the push rod 3, a reaction force will be generated. The two I-beams can evenly disperse the reaction force generated during the working process of the first oil jack 11 to the bearing steel plate, and then the bearing steel plate is evenly transmitted to the wall of the receiving well 8, thereby improving the force dispersion effect, so that the first oil jack 11 maintains stability during the working process, thereby ensuring the smooth progress of the push rod 3 pushing in or pulling out operation. The size of the load-bearing steel plate is larger than the diameter of the original pipe 7. During use, the load-bearing steel plate completely covers the pipe opening and is close to the well wall; the length of the load-bearing steel plate is 1~1.5m, the width is 1~1.5m, and the thickness is 5~8cm; the I-beam adopts I20a I-beam, each I-beam is 1.5m long and embedded 0.5m underground. The oil cylinder of the first oil jack 11 is a hollow oil cylinder, the aperture of the oil cylinder is 5~8cm larger than the diameter of the push rod unit, the push rod unit 31 can pass through the oil cylinder smoothly, and the oil cylinder can provide a preset force for the push rod unit; the outer diameter of the first oil jack 11 is not larger than the diameter of the original pipe 7. During use, the oil cylinder preferably adopts a 50t hydraulic oil cylinder, and the first oil jack preferably adopts a 150t hydraulic jack.

[0033] The second oil jack workbench 2 includes a second oil jack 21 and a second bearing structure 22. The second oil jack 21 is connected to the oil circuit control system through an oil pipe. The second oil jack 21 provides power for pushing in the extruder 4 and the new pipe section 6. The second bearing structure 22 includes a bearing steel plate and an I-beam. The bearing steel plate is arranged on the well wall of the insertion well 9, and its bottom is embedded in the ground. The bearing steel plate is provided with a mounting hole. Two I-beams are relatively arranged on both sides of the mounting hole of the bearing steel plate, and the bottom of the I-beam is embedded in the ground. The second oil jack 21 is arranged between the two I-beams and passes through the mounting hole. A top plate 23 is arranged on the second oil jack 21. The top plate 23 is used to push the new pipe section 6 into the original pipeline 7. The top plate 23 is made of a 3-5 cm thick steel plate. During use, the first oil jack 21 preferably uses a 150t hydraulic jack, and the oil cylinder of the first oil jack 21 preferably uses a 50t hydraulic cylinder.

[0034] The push rod unit 31 is a cylindrical rod member, the first end of the push rod unit 31 is provided with an internal thread, the second end is provided with an external thread, adjacent push rod units 31 are threadedly connected, one or more pin holes are provided in the length direction of the push rod unit 31, and the push rod unit 31 is connected to the first oil pusher 11 through a pin; the length of each section of the push rod unit is 50~70cm.

[0035] The direction-adjusting centralizer 5 is coaxially arranged on the first-section push rod unit 31. The direction-adjusting centralizer 5 includes a cone tip 52. The cone tip 52 is detachably connected, welded or integrally formed with the first-section push rod unit 31. The cone bottom of the cone tip 52 is connected to the push rod unit 31. When the original pipeline 7 is blocked, the cone tip 52 can pass through the blockage. The diameter of the cone tip 52 gradually increases from the cone top to the cone bottom. Its cone surface helps the push rod 3 to push in and disperse the debris in the original pipeline. The blockage can be squeezed into the soil around the original pipeline 7 by the cone tip 52, so that the push rod 3 can always be pushed in smoothly along the existing route of the original pipeline 7.

[0036] The steering centralizer 5 further includes a steering ball 51, which is detachably connected, welded or integrally formed with the first section push rod unit 31, and the cone tip 52 is coaxially arranged with the steering ball 51, and the steering ball 51 is arranged between the push rod unit 51 and the cone tip 52 (refer to Figure 2 ), the cone tip 52 and the steering ball 51 are detachably connected, welded or integrally formed; when the steering ball 51 is detachably connected to the push rod unit 31 and the cone tip 52 respectively, the first end of the push rod unit 31 and the cone bottom of the cone tip 52 are respectively provided with grooves adapted to the surface of the steering ball 51, and a connecting hole is axially provided in the middle of the groove, and connecting rods are radially symmetrically provided on the steering ball 51 (the connecting rods are welded or integrally formed with the steering ball), and the steering ball 51 is threadedly connected to the push rod unit 31 and the cone tip 52 respectively. The connecting parts of the steering ball 51, the push rod unit 31 and the cone tip 52 have a smooth transition, and when advancing in the original pipeline 7, the dispersion performance of the steering centralizer on blockages can be improved. The diameter of the steering ball 51 is larger than the diameter of the cone bottom of the cone tip 52. When the original pipe 7 is blocked, the cone tip 52 can pass through the blockage. Under the action of the steering ball 51 behind the cone tip 52, the blockage can be prevented from entering the original pipe 7 behind the steering ball 51, thereby preventing the blockage from hindering the advancement of the push rod 3. During the process of the push rod 3 being pushed into the original pipe 7, the steering ball 51 can also prevent the push rod 3 from deviating from the push route, so that the push rod 3 can always be pushed smoothly along the existing route of the original pipe 7.

[0037] During use, the two cone tips 52 can also be symmetrically arranged relative to the steering ball 51 (refer to Figure 4), two cone tips 52 are connected to the steering ball 51 to form an integrated structure. During the advancement of the push rod 3, the steering ball 51 and the cone tip 52 can enable the push rod 3 to be smoothly advanced along the original pipe 7. During the placement of the new pipe segment 6, when there are still obstacles in the pipeline, the steering ball 51 and the cone tip 52 can pass through the obstacles, so that the new pipe segment 6 can smoothly replace the original pipe 7. A connecting rod 53 is coaxially arranged on the cone bottom of one of the cone tips 52 (or a connecting rod is arranged on the cone bottom of both cone tips), and the connecting rod 53 is threadedly connected to the push rod unit or the extruder 4. Reference Figure 3 During use, the two adjustment balls 51 can also be connected by a connecting rod 53. The connecting rods 53 on the two adjustment balls 51 are threaded or connected by a pin. Each adjustment ball 51 is provided with a cone tip 52. The adjustment straightener 5 can play a role in correcting and positioning during the process of jacking the jacking rod or the jacking of the new pipe section. During the jacking of the new pipe section, the number of times for checking the height and position of the jacking rod and the new pipe section can be reduced, thereby improving the construction efficiency.

[0038] The diameter of the steering ball 51 is not less than the diameter of the push rod unit 31. The diameter of the push rod unit 31 changes with the diameter of the original pipe 7. In a preferred embodiment, the ratio of the diameter of the push rod unit 31 to the diameter of the original pipe 7 is 3:4. The diameter of the push rod unit 31 is slightly smaller than the diameter of the original pipe 7. During the push rod jacking process, the gap between the push rod unit and the original pipe is small. Under the action of the cone tip 52, it helps the push rod unit to pass through obstacles and reduce the resistance during the push rod jacking or pulling back process, so that the push rod jacking and the new pipe section can be smoothly inserted. When encountering obstacles (such as burrs, protrusions, blockages, etc. in the pipe), the push rod itself can also clear away some obstacles, reducing the working difficulty of the expander 4.

[0039] The extruder 4 is a cylindrical structure, and a plurality of guide drill blades 41 are arranged circumferentially on the outer wall of the extruder 4 (refer to Figure 7), when the squeezer 4 advances in the original pipe 7, the multiple guide drill blades 41 can crush different parts of the original pipe 7, so that the original pipe 7 is formed into fragments, and the fragments are squeezed into the surrounding soil by the squeezer 4. The squeezer 4 can be a solid structure or a hollow structure; when the squeezer 4 is a hollow structure, the inner diameter of one end of the squeezer 4 is not greater than the diameter of the adjustment ball 51 or the cone tip 52, and the inner diameter of the other end of the squeezer 4 is not greater than the inner diameter of the new pipe section 6. When the adjustment straightener 5 includes the adjustment ball 51 and the cone tip 52, the squeezer 4 with a hollow structure can fully contact with the surface of the adjustment straightener 5, and there will be no gap between the contact part of the squeezer 4 and the adjustment ball 51. During the advancement of the squeezer 4, the debris can be prevented from entering the squeezer; the squeezer 4 is in full contact with the adjustment ball 51, and during the placement of the new pipe section 6, the squeezer 4 can be subjected to a stable force, ensuring the smooth progress of the crushing of the original pipe 7 and the placement of the new pipe section 6. When the squeezer 4 is a solid structure, the squeezer 4 can be abutted or threaded with the direction-adjusting stabilizer 5. When threaded, a connecting hole is coaxially arranged on the squeezer 4, and the connecting hole is connected to the connecting rod on the direction-adjusting stabilizer. The squeezer 4 and the direction-adjusting stabilizer 5 are connected into an integrated structure. Under the pulling force of the push rod 3 and the pressure of the second oil-jacking workbench 2, the crushing and squeezing effect of the squeezer 4 on the original pipe 7 can be improved. A positioning ring 42 is also coaxially arranged on the squeezer 4 (refer to Figure 5 ), the diameter of the positioning ring 42 matches the inner diameter of the new pipe segment 6, and the new pipe segment 6 is connected to the positioning ring 42. During the jacking process of the new pipe segment 6 in the original pipe 7, the movement route of the new pipe segment 6 can be prevented from being deviated, thereby ensuring the installation quality of the new pipe segment 6. The outer diameter of the squeezer 4 is larger than the inner diameter of the original pipe 7, so that the fragments of the original pipe can be squeezed into the soil. The end face of the squeezer 4 entering the pipe opening of the original pipe 7 is set as a wedge structure, so that the squeezer 4 can smoothly enter the original pipe 7.

[0040] The new pipe section 6 is made of high-density polyethylene pipe (HDPE pipe). The length of each new pipe section is 50~70cm, which corresponds to the length of the top rod unit. In the application process, a pipe section with a length of 54cm is preferably used. The adjacent new pipe sections 6 are connected by a socket-and-socket locking method. The socket-and-socket overlap length is 10cm. The thickness of the overlap part is 1 / 2 of the thickness of the new pipe section. The gap after tightening is 0.15mm. A sealing ring a is provided at the connection position of the new pipe section 6 (reference Figure 6), the sealing ring a is set in the sealing groove, the groove depth of the sealing groove is 3mm, the groove width is 4mm, and the sealing ring a is a rubber ring with a cross-sectional diameter of 4mm. The outer diameter of the new pipe segment 7 is not less than the diameter of the original pipe 7, and the minimum wall thickness of the new pipe segment 6 satisfies SDR= DO / t, where SDR represents the standard dimension ratio of the pipeline, DO represents the outer diameter of the pipeline (mm), and t represents the wall thickness of the pipeline (mm); when the covering depth of the pipeline is not more than 5m, SDR=21, when the covering depth of the pipeline is more than 5m, SDR=17; during use, the outer diameter of the pipeline is 300~800mm, and the covering depth is not less than 1.5m. The distance between the receiving well 8 and the insertion well 9 is 30~50m.

[0041] The above is only a detailed description of the specific implementation of the utility model, rather than a limitation of the utility model. Various substitutions, modifications and improvements made by technicians in the relevant technical field without departing from the principle and scope of the utility model should be included in the protection scope of the utility model.

Claims

1. A static fracturing pipe short pipe replacement device, characterized in that: It comprises a first oil top working platform (1) arranged in a receiving well (8) and a second oil top working platform (2) arranged in an insertion well (9), and also comprises a push rod (3), an extruder (4), a direction adjusting centralizer (5) and a new pipe section (6); The first oil-jacking workbench (1) is used to apply pressure or tension to the push rod (3) to push the push rod (3) into or pull out the original pipe (7); the push rod (3) comprises a plurality of push rod units (31) connected in sequence; the squeezer (4) is used to break the original pipe (7) and squeeze the original pipe (7) into the soil around the original pipe (7); the direction-adjusting straightener (5) is coaxially arranged on the push rod (3) to correct the deviation and direction so that the push rod (3) is pushed along the wall of the original pipe; the second oil-jacking workbench (2) is used to push the new pipe section (6) into the original pipe (7) so that the new pipe section (6) replaces the original pipe (7); the second oil-jacking workbench (2) is also used to apply pressure to the squeezer (4) and the new pipe section (6) so that the squeezer (4) and the new pipe section (6) move forward in the original pipe (7) and break the original pipe (7).

2. The static fracturing pipe short pipe replacement device according to claim 1, characterized in that: The first oil top workbench (1) comprises a first oil top (11) and a first load-bearing structure (12), and the first oil top (11) is connected to an oil circuit control system; the second oil top workbench (2) comprises a second oil top (21) and a second load-bearing structure (22), and the second oil top (21) is connected to an oil circuit control system.

3. The static fracturing pipe short pipe replacement device according to claim 2, characterized in that: The first load-bearing structure (12) comprises a load-bearing steel plate and an I-beam, the load-bearing steel plate being arranged on the wall of the receiving well (8), the bottom of the load-bearing steel plate being embedded in the ground, a mounting hole being arranged on the load-bearing steel plate, two I-beams being arranged oppositely on both sides of the mounting hole of the load-bearing steel plate, the bottom of the I-beam being embedded in the ground; the first oil top (11) being arranged between the two I-beams and passing through the mounting hole; the second load-bearing structure (22) comprises a load-bearing steel plate and an I-beam.

4. The static fracturing pipe short pipe replacement device according to claim 1, characterized in that: The push rod unit (31) is a cylindrical rod, the first end of the push rod unit (31) is provided with an internal thread, the second end is provided with an external thread, and one or more pin holes are provided in the length direction of the push rod unit (31).

5. The static fracturing pipe short pipe replacement device according to claim 1, characterized in that: The direction-adjusting centralizer (5) comprises a cone tip (52), and the cone bottom of the cone tip (52) is detachably connected, welded or integrally formed with the first-section push rod unit (31).

6. The static fracturing pipe short pipe replacement device according to claim 1, characterized in that: The steering centralizer (5) comprises a steering ball (51) and a cone tip (52), wherein the cone tip (52) is coaxially arranged with the steering ball (51), the steering ball (51) is arranged between the top rod unit (31) and the cone tip (52), or the steering ball (51) is arranged between two opposite cone tips (52), or two steering balls (51) are arranged between two opposite cone tips (52).

7. The static fracturing pipe short pipe replacement device according to claim 6, characterized in that: The steering ball (51) is provided with connecting rods in radial symmetry, the first end of the push rod unit (31) or the cone bottom of the cone tip (52) is coaxially provided with a connecting hole, and the cone bottom and / or cone top of the cone tip (52) are coaxially provided with a connecting rod.

8. The static fracturing pipe short pipe replacement device according to claim 6, characterized in that: The diameter of the steering ball (51) is larger than the diameter of the cone base of the cone tip (52), the diameter of the steering ball (51) is not smaller than the diameter of the push rod unit (31), and the diameter of the push rod unit (31) is slightly smaller than the diameter of the original pipe (7).

9. The static fracturing pipe short pipe replacement device according to any one of claims 1 to 8, characterized in that: The squeezer (4) is a solid or hollow cylindrical structure, a plurality of guide drill blades (41) are circumferentially arranged on the outer wall of the squeezer (4), and a positioning ring (42) is coaxially arranged on the squeezer (4).

10. The static fracturing pipe short pipe replacement device according to claim 9, characterized in that: The new pipe sections (6) are made of high-density high-pressure polyethylene pipes, and adjacent new pipe sections (6) are connected by means of a socket-and-spigot locking method. A sealing ring is provided at the connection position of the new pipe sections (6).

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